 /*******************************************************************************
  * Copyright (c) 2006-2007 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM - Initial API and implementation
  *******************************************************************************/
 package org.eclipse.update.internal.jarprocessor;

 import java.io.File ;

 public class Main {

     public static class Options {
         public String outputDir = "."; //$NON-NLS-1$
 public String signCommand = null;
         public boolean pack = false;
         public boolean repack = false;
         public boolean unpack = false;
         public boolean verbose = false;
         public boolean processAll = false;
         public File input = null;
     }

     private static void printUsage() {
         System.out.println("[-option ...]... input"); //$NON-NLS-1$
 System.out.println("The following options are supported:"); //$NON-NLS-1$
 System.out.println("-processAll process all jars, regardless of whether they were previously normalized"); //$NON-NLS-1$
 System.out.println(" By default only normalized jars will be processed."); //$NON-NLS-1$
 System.out.println("-repack normalize jars "); //$NON-NLS-1$
 System.out.println("-sign <command> sign jars using <command>"); //$NON-NLS-1$
 System.out.println("-pack pack the jars. pack and repack are redundant unless"); //$NON-NLS-1$
 System.out.println(" sign is also specified."); //$NON-NLS-1$
 System.out.println("-unpack unpack pack.gz files. Unpack is mutually exclusive"); //$NON-NLS-1$
 System.out.println(" with repack, sign and pack."); //$NON-NLS-1$
 System.out.println();
         System.out.println("-outputDir <dir> the output directory"); //$NON-NLS-1$
 System.out.println("-verbose verbose mode "); //$NON-NLS-1$
 }

     public static Options processArguments(String [] args) {
         if (args.length == 0) {
             printUsage();
             return null;
         }

         Options options = new Options();
         int i = 0;
         for (; i < args.length - 1; i++) {
             if (args[i].equals("-pack")) {//$NON-NLS-1$
 options.pack = true;
             } else if (args[i].equals("-unpack")) { //$NON-NLS-1$
 options.unpack = true;
             } else if (args[i].equals("-sign") && i < args.length - 2) { //$NON-NLS-1$
 if (args[i + 1].startsWith("-")) { //$NON-NLS-1$
 printUsage();
                     return null;
                 }
                 options.signCommand = args[++i];
             } else if (args[i].equals("-repack")) { //$NON-NLS-1$
 options.repack = true;
             } else if (args[i].equals("-outputDir") && i < args.length - 2) { //$NON-NLS-1$
 if (args[i + 1].startsWith("-")) { //$NON-NLS-1$
 printUsage();
                     return null;
                 }
                 options.outputDir = args[++i];
             } else if (args[i].equals("-verbose")) { //$NON-NLS-1$
 options.verbose = true;
             } else if (args[i].equals("-processAll")) { //$NON-NLS-1$
 options.processAll = true;
             }
         }

         options.input = new File (args[i]);

         String problemMessage = null;
         String inputName = options.input.getName();
         if (options.unpack) {
             if (!JarProcessor.canPerformUnpack()) {
                 problemMessage = "The unpack200 command cannot be found."; //$NON-NLS-1$
 } else if (options.input.isFile() && !inputName.endsWith(".zip") && !inputName.endsWith(".pack.gz")) { //$NON-NLS-1$ //$NON-NLS-2$
 problemMessage = "Input file is not a pack.gz file."; //$NON-NLS-1$
 } else if (options.pack || options.repack || options.signCommand != null) {
                 problemMessage = "Pack, repack or sign cannot be specified with unpack."; //$NON-NLS-1$
 }
         } else {
             if (options.input.isFile() && !inputName.endsWith(".zip") && !inputName.endsWith(".jar")) { //$NON-NLS-1$ //$NON-NLS-2$
 problemMessage = "Input file is not a jar file."; //$NON-NLS-1$
 } else if ((options.pack || options.repack) && !JarProcessor.canPerformPack()) {
                 problemMessage = "The pack200 command can not be found."; //$NON-NLS-1$
 }
         }
         if(problemMessage != null){
             System.out.println(problemMessage);
             System.out.println();
             printUsage();
             return null;
         }

         return options;
     }
     
     /**
      * @param args
      */
     public static void main(String [] args) {
         Options options = processArguments(args);
         if (options == null)
             return;
         new JarProcessorExecutor().runJarProcessor(options);
     }

 }

